Abrading machine



18, 1941. J. B. HADAWAY ABRADING momma 6 Sheets-Sheet 1 Filed Sept. 22, 1939 Nov. 18, 1941.- Y J HADAWAY 2,262,801

ABRADING MACHINE Filed Sept. 22, 1939 6 SheetsSheet 2 Nov. 18, 1941. J. B. HADAWAY ABRADING MACHINE Filed Sepg. 22, 1939 6 Sheets-Sheet 5 //VVNTUR- 6. W ,W -L ?M s. W.

- 6 Sheets-Sheet 4 Nov. 18, 1941. J. B. HADAWAY ABRADING MACHINE Filed Sept. 22, 1959 6 Sheets-Sheet 5 Nov. 18, 1941. J. B. HADAWAY ABRADING MACHINE Filed Sept. 22, 1939 a: 2.. Ev P 5 Nov. 18, 1941. J. B. HADAWAY 2,262,801

ABRADING MACHINE Patented Nov. 18, 1941 anaanmc mom John B. HadawaY,

Swampscott, Mass Machinery Corporation,

deceased, late of Swampscott. by Florence S. Hadaway,

executrix,

asslgnor to United Shoe Borough of Flemington, N. 3., a corporation of New Jersey Application September 22, 1939, SeriaINo. 296,104.

14 Claims. (Cl. 51-3) This invention relates to ab'rading machines and is herein illustrated as embodied in a machine for bufling the bottoms and heel-breast faces of boots and shoes.

In the manufacture of shoes it is customary to bufl the bottoms of the soles by means of a machine, which is provided with an abrading tool, for example, an inflated disk-like tool of the socalled Naumkeag type. The spaces between the grains of abrasive material on the operative face of an abrading tool tend to become more or less filled with the dust generated by the operation of the tool upon the work, so that after a time the tool becomes less eflicient.

According to One feature of the present invention, there is provided in an abrading machine means responsive to presentation of a piece of work to the abrading tool for directing upon the tool a blast of air to clean it. In the illustrated machine, presentation of a piece of work to the tool lifts the tool slightly and opens a valve in a compressed air conduit leading to a nozzle which is directed toward the operative face of the tool.

If a tool of the inflatable type, such as a Naumkeag tool, is embodied in the machine, it is of course necessary to inflate the tool, and in such case, in accordance with another feature of the invention, a source of supply of compressed air is provided together with means for conductin air at a lesser pressure to the tool to inflate it and means for conducting air at a greater pressure to the nozzle which directs a blast of air upon the tool to clean it.

In a shoe buffing machine it is desirable to make use of a plurality of tools, for example, a Naumkeag tool, to buff the bottom of the sole and a so-called Hildebrand tool to buif the breast and lip of a Louis heel. According to another feature of the present invention, there are provided two tools of different types, a suction hood for removing waste material generated by the operation of the tools, and operator-controlled pneumatic means for moving the tools to locate a selected one of them in operative position in front of the dust hood.

cluding certain details of construction and combinations of parts, will be described as embodied in an illustrated machine and pointed out in the appended claims.

Referring to the accompanying drawings,

Fig. 1 is a side elevation of a machine in which the present invention is embodied;

Fig. 2 is a front elevation of the machine;

Fig. 3 is a view looking down upon the rear part of the machine;

Fig. 4 is a view, partly in section and partly in elevation, showing more particularly the mounting of that one of the Naumkeag tools which may Bic swung into operative and inoperative posions;

Fig. 5 is a section on the line V--V of Fig. 4;

Fig. 6 is a detail in elevation showing more particularly the nozzles for directing blasts of air upon one of the Naumkeag tools to clean it. The nozzles are shown in the position into which they have been pulled down against the force of a torsion spring;

Fig. '1 is a side elevation showing more particularly the mountings of the Hildebrand tool and the scouring disc;

Fig. 8 is a detail in plan showing more particularly the mechanism for locking the carrier of the Hildebrand tool and the scouring disc in intermediate position;

Fig. 9 is a detail in cross section on the line IX -IX of Fig. 7;

Fig. 10 is a view, partly in elevation and partly in longitudinal section, showing more particularly the construction of the expansible link;

Fig. 11 is a perspective showing the valves for controlling the application of suction to the hoods of the Naumkeag tools and to the hood of the shoe cleaning brush; and

, buffing tools, two main tools l1 and I9 of the inflated Naumkeag disk type for bufling the greater part of the bottom of the sole of a shoe, and two auxiliary tools, a Hildebrand tool 2| (see Patent No. 2,018,671, October 29, 1935) for buffing the breasts of Louis heels as well as for but!- ing the underside of the curved lips of Continental heels, and a small rotary disk 23 forbufllngthe portion of the sole which is adjacent to the breast of a Cuban or similar heel. The Naumkeag tool l9 occupies always a fixed position in front of its dust hood 25. The other Naumkeag tool |1 may occupy a similar operative position in front of its dust )hood 21, or it may occupy the inoperative position shown in which it has been swung to one side as far as it can be. The Hildebrand tool and the scouring disk are mounted in a carrier in the form of a hollow member or shell 29 and may occupy three positions, two of which are operative positions and one of which is inoperative. It is shown in the figure in the lower one of its two operative positions, but may be moved up to its intermediate operative position, or still farther up to its inoperative position. The movements of the carrier for the Hildebrand tool and for the scouring disk and of the left-hand Naumkeag tool to position the various tools in the manner described above take place simultaneously and are caused by a compressed air device operated by a treadle.

When a shoe is to be operated upon, the parts 01' the machine may be at first in the positions shown in Fig. l, in which the Hildebrand tool and the scouring disk are in position to have the dust caused by their operation carried away by the dust hood 25. The shoe is presented to the selected one of these two tools, depending upon the style of its heel, after which a treadle is manipulated to cause the.carrier for these two tools. to move to its uppermost position, where the tools are out of the way and at the same time to cause the Naumkeag tool H to swing into position in front of its dust hood 21. The sole of the shoe is then buffed by presenting it to the Naumkeag tools, one of which has coarse and the other fine grit. The above is the ordinary procedure. It is, however, possible, if desired, to cause the carrier 29 for the Hildebrand tool and the scouring disk to be moved into an intermediate position in which the scouring disk may be used, and at the same time to swing the Naumkeag tool |1 into position in front of its dust hood. With this location of the tools it is possible to bufl the sole of a shoe having a Cuban heel, since the scouring disk and the two Naumkeag tools are all three in operative positions.

The carrier 29 for the Hildebrand tool 2| and the scouring disk 23 (Fig. 7) has the general shape of a hollow cylinder provided with a short right-angled extension and is rotatably mounted between vertically spaced, generally horizontal extensions projecting from and rigid with a bracket 3| which is bolted to the outer end of a vertically swinging arm 33. This arm has the general shape in cross section of an inverted U and its inner end (Fig. 1) is pivoted about the axis of a countershaft 35. Referring again to Fig. 7, the arm is steadied in its vertical swinging movement by an upright guide 31 having a curved edge. The outer end of the arm 33 has a flat side in contact with that side of the guide which is visible in Fig. 7. The upper flat end of the bracket 3| is of substantially the same thickness as that of the guide; and bolts 39, which fasten the bracket 3| to the arm 33, also fasten in place against the opposite side of the guide 31 a plate 4| (see also Fig. 8), the upper portion of which overhangs the upper edge of the bracket 3| and carries a spring-pressed plunger 43 which, as will be explained later, by entering a hole 45 in the edge of the guide 31 serves to lock the arm,33 in its intermediate position. The arm 33 is raised and lowered by means of a yoke 41 (Fig. 1), the upper ends of the arms of which are pivoted to extends down into a small cylinder 5| and carries at its lower end a piston, not shown, which fits in the cylinder. The piston is moved up and down to swing the arm 33 up and down by means of compressed air. To this end, a pipe 53 leads from the top of the cylinder 5| above the piston to the upper end of a pipe 55, the lower end of which is connected to a valve casing, not shown, located in a box 51; a second pipe 59 leads from the bottom of the cylinder 5| below the piston to the upper end of a pipe 6|, the lower end of which leads into the same valve casing; and a supply pipe 53 leads from a source of supply of compressed air into the same casing. A plurality of valves, not shown, in the valve casing may be moved into two operative positions. In one position, the supply pipe 63 is connected to the pipe 55 which leads into the top of the cylinder, and

the pipe BI is opened to the atmosphere. In the other operative position, the supply pipe 53 iscylinder 5| to raise and lower the arm 33 form no I part of the present invention, and any suitable valve mechanism may be used.

The compressed air is supplied to the machine for the above and other purposes, presently to be explained, through a main air supply pipe 59 (Fig. 2). This pipe extends down, then toward the observer into a T 1|, then upward from the T into the bottom of an air cleaner 13, a pet cock 15 carried by the T providing means for drawing ofi water or other impurities separated from. the air by the cleaner. From the top of the cleaner 13, a conduit 11 comprising nipples and elbows leads into the top of a T 19. From the back of this T a pipe, not shown, leads rearward and then turns to the right across the rear part of the machine, said pipe terminating in an elbow 8| (Fig. 1) which leads into one end of a union 83. To the other end of this union is connected one end of a. pipe 85, the other end of which is connected to the horizontal opening in a T, (not shown because it is in front of and would obscure the showing of the cylinder 5|), the upper and lower openings of which are connected respectively with a pipe 81 and with the pipe 63. The pipe 81 leads through certain pressure gages to other parts of the machine. Disregarding for the moment this pipe 81, it will be seen that compressed air, at whatever pressure it is supplied, flows from the main supply pipe 69, through the air cleaner and the various conduits described above, directly to the box 51 in which is located the valve mechanism for controlling the flow of air to the cylinder 5| and thus swinging up and down, when desired, the arm 33 by which the Hildebrand tool and the scouring disk are carried.

The two last-named tools are rotated, except when they have been moved up to their highest inoperative position, by a round belt 89 (Fig. 7) which passes around a pulley 9| fastened to the top of a slightly inclined shaft 93. This belt extends through the hollow in the arm 33 to the rear of the machine, one run passing over a guide pulley 94 (Fig. 3), and around a grooved pulley 95, which is loose on the countershaft 35 but is normally held to rotate therewith by a friction clutch member 91. This friction clutch member 91 is fast to the left-hand end of a small shaft 99, which is concentric with the countershaft 35 and is rotatably and slidably mounted in a bearing IOI, said small shaft 99 carrying near its right-hand end a disk I03. Extending respectively over and under the disk are the arms of a fork formed at the outer end of a bell-crank lever I pivoted about a vertical pivot I01, each arm carrying two pins, one on each side of thedisc I03, the two pins in' the upper arm being indicated at I09. A tension spring III tends at all times to swing the bell-crank lever I05 clockwise and thus to hold the friction clutch member 91 in contact with one side of the pulley 95. so as to drive the pulley and hence to rotate the Hildebrand tool and the securing disk. One arm of' the bell-crank lever I05 carries a small roll H3; and when the arm 33, which carries the two tools just mentioned, is swung to its uppermost position, the projecting right-hand end of the pivot pin 49 strikes'the roll, rocks the bell-crank lever counterclockwise and moves the friction clutch member 91 away from the pulley 95, so that the Hildebrand tool and the scouring disk are no longer rotated.

When the carrier 29 for the Hildebrand tool and the scouring disk is moved up by the upward swing of the arm 33, it is at the same time given a partial rotation to the left, as viewed in Fig. 1. Referring now to Figs. 7 and 9, the mounting of the carrier 29 in the bracket 3|, which is bolted to the outer end of the swinging arm 33, and the mounting of the Hildebrand tool and the scouring disk in the carrier will be described. The carrier 29 has a generally cylindrical main portion and a short cylindrical extension at right angles to the main portion. It is swung about the axis of the inclined shaft 93 by means of a bent rod II5, which is pulled to the left, as will presently be explained, when the arm 33 is swung up. The rod 5 is pivoted at 1 between ears formed on a small bracket II9, which is fastened to a rotatable collar I2I. This collar rests upon the upper one of the two horizontal extensions of the bracket 3| and has on its underside a hub which extends down through a bore or bearing in said extension. The hub of the collar I2| is held from vertical movement by a screw I22, which is threaded through a wall of the extension of the bracket 3| and extends into an annular groove in the periphery of the hub. The shaft 93 is made in two parts, an upper part having at its lower end a collar I23 and a downwardly projecting key I25 and a lower part having at its upper end a key-' way to receive the key. A headed bushing I21 carried by the collar I2I extends through said collar and receives the upper part of the shaft 93, the pulley 9| resting upon the head of the bushing I21 and upon the top of the collar I2I. That part of the hub I2l, which projects down below the upper generally horizontal extension of the bracket 3|, fits into the upper end of the main part of the carrier 29. Inside the carrier 29 is a sleeve I3I, which is fastened to the carrier by screws, one of which is shown at I33 and which is connected to the hub of the collar I2I by dowel pins I35. Below the sleeve I3I, a spiral gear I31 is pinned to the shaft 93, said gear resting upon a block I39 which is fastened to the carrier 29 by a screw HI and has a central bore to serve as a bearing for the lower part of the shaft 33. The lower end of the carrier 29 rests upon the upper face of the lower extension of the bracket 3| and is rotatable about the upper end of a cylindrical bearing member I43 which projects up through a bore in said lower extension of the bracket 3| and is held in place by a set screw I45. With the construction described above, the carrier 29 will be rocked about the axis of the shaft 93 in one direction or the other, when the rod H5 is pulled to the right or to the left.

The gear I31 meshes with and drives a gear I41 on the shaft upon which the Hildebrand tool 2| is mounted. The gear. I41 in turn meshes with and drives a gear I49 on a shaft I'5I, which carries at its outer end a small spiral gear I53, said gear meshing with another small spiral gear I55 on a small inclined shaft I51, to the lower end of which the scouring disk 23 is fastened. The shaft I5I is in two parts connected by a key and keyway; and the housing I53, in which the outer part of the shaft I5I and the disk shaft I51 are mounted, is 'detachably fastened to the extension of the carrier 29. Referring to Fig. 2, where the housing I53 appears in end elevation, it will be seen that the shape of the housing and the inclination of the shaft of the scouring disk 23 are such that that portion of the bottom of the sole of ashoe which is adjacent to the base of the Cuban heel may be buffed.

As has been explained, when the arm 33, upon the outer end of which is rotatably mounted the carrier 29, is swung up, the carrier is. rotated by pulling to the left (Fig. 7) the rod 5. This rod is connected by a turnbuckle I52 to one end of another rod I54, the other end of which is pivoted at I56 to the lower end of a bell-crank lever I59 pivoted to the arm 33 at IGI, the upper end of the bell-crank lever being pivoted at I63 to the upper end of a bent link I65, the lower end of which is pivoted at I01 to a small bracket carried by the frame of the machine. Thus, when the arm 33 is in its lowest position, the carrier 29 occupies a position shown in Figs. 2 and 7 with the Hildebrand tool in front of the dust hood 21; and when the arm is raised the carrier 29 is rotated to move the Hildebrand tool and the scouring disk farther away from the observer, as viewed in Fig. 2; and as the arm ap proaches its highest position, the pin 49 (Fig. 3) cpntacts with the roll I3 on the bell-crank lever I05 and disconnects the Hildebrand tool and the scouring disk from their driving mechanism. When the arm 33 and the carrier 29 are in their lowermost positions, the left-hand Naumkeag tool I1 (Fig. 2 has been swung to the left to its outer inoperative position; and when the arm has been swung to its uppermost position the left-hand Naumkeag tool occupies the same position with respect to the dust hood 21 that the other Naumkeag tool I9 occupies with respect to its dust hood 25.

The Naumkeag tool I1 (Fig. 2) is detachably mounted in the usual manner at the lower end of a hollow upright spindle I69, this spindle in t e illustrated machine being rotatable in bearings in a bracket I1I, which is mounted for horizontal swinging movement about an upright stationary rod I13. This horizontal swinging bracket is connected to the vertically swinging arm 33 by an extensible link, indicated as a whole at I15 in Fig. 2 and shown in detail in Fig. 10. The link is connected at one end to the arm 33 by a ball-and-socket joint and at the other end to the bracket "I by a joint of the I in the stem of the to free the locking plunger 43 same kind. As shown, this link is in its full extended condition, in which it will cause the lefthand Naumkeagtool I1 (Fig. 2) to be moved in front of the dust hood 21 when the arm 33 is swung to its uppermost position. At times, however, the arm is swung to an intermediate position in which the Hildebrand tool and the scouring disk 23 are still being rotated and the scouring disk may be used; and it is desirable, when the two tools Just mentioned are in this intermediate position, that the left-hand Naumkeag tool should be in operative position in front of its dust hood 21, so that this Naumkeagtool, as well as the other Naumkeag tool I9, may be used. It is for this reason that an extensible link is provided. When it is desired to move the arm 33 up from its lowest to its intermediate position, the extensible link I15 is shortened; and atthe same time the locking plunger 93 (Fig. 8) is freedso that it may enter the hole 45 inthe curved face of the upright guide member 31. This locking plunger is normally held in inoperative position by a pawl I11 pivoted at I19 to the arm 33 and held by a torsion spring I8I in such position that the operative end of the pawl engages a collar I83 on the plunger, which is being urged at all times by a compression spring I85 to move to the left and to enter the hole 45 when it is in register with the hole. When the extensible link is shortened, a push pin I81 is moved to the right (Fig. 10) to swing the pawl and thereby free the locking plunger 43. In Fig. 10 the extensible link I is shown in its extended condition, the link comprising two sections I89, I9I connected by a turnbuckle I93, the section I89 extending into a socket in a cap I95, in which it is slidable. The cap has a stem provided at its outer end with aball forming a part of the ball-and-socket joint which connects the link with the swinging arm 33. Extending through and fastened to a lug on the arm 33 is a cylindrical member I91, the left-hand end of which forms part of the ball-and-socket joint, the push pin I81 being loosely mounted for sliding movement-in a central bore in this member. When the link I15 is extended, as shown, this pin is inoperative, but when the link is shortened the .pin pushedto the right to swing the tail of the pawl I11 and thereby (Fig. 8) free the locking plunger 43. The link is held in extended condi-. tion by means of balls [99 which are located partly in holes extending through the wall of the cap I95 and partly in a circumferential groove in the section I89 of the link, said balls being thus held by a locking sleeve 28I slidably mounted on the cap I95 and constantly urged to move to the left by a compression spring 283, the extent of left-hand movement of the sleeve being limited by ascrew 285 threaded through the wall of the sleeve and extending into a groove 281 formed in the wall of the cap. When, now, it is desired to shorten the link I15, the locking sleeve is pulled to the right to release the balls, and the section I89 of the link is pushed into the cap I95 until a second circumferential groove 289 in the section I89 leased and locks the link I15 in its shortened condition. When the section I89 is pushed into the cap I95 its right-hand end pushes to the right a small pin 2| I,

said spring acting the push pin I81 to the pawl I11 so as (Fig. 8).

ap. through a ball 2| 3 to move the right and thus to swing is in register with the balls I99, whereupon the locking sleeve is rewhich is slidable in a bore is being presented to a cleaning brush, later to be described. As has been explained, air under full factory pressure is used to raise and lower the Hildebrand tool and the scouring disk. Air under full factory pressure is also used to remove dust from the shoe, but air, which may be at a somewhat reduced pressure, is used to clean the scouring disk and the Naumkeag tools, and air. which is at a greatly reduced pressure, is used to inflate the Naumkeag tools.

The pipe 81, which as has been explained is connected at its lower end to the pipe 83, and therefore contains air at full factory pressure, leads up into a large reducing valve 2I5 having attached to it a pressure gage 2". From the bottom of this large reducing valve leads a T to which are connected two pipes 2I9, 22I. The pipe 2I9 leads to a second smaller reducing valve 223, having a second pressure gage 225; and from this reducing valve 223 runs a pipe 221, which is connected to a T at 229. A horizontal pipe 23I leads from this T through a rubber tube 233 into a chamber which communicates with the top of the hollow shaft I 89, upon the lower end of which the Naumkeag tool I1 is mounted; and a second horizontal pipe 235 leads from the T 229 through piping, not shown,.into a similar chamber which communicates with the top of the hollow shaft, upon the lower end of which the other Naumkeag tool I9 is mounted. The pressure used to inflate the Naumkeag tools is from 1 to 5 pounds per square inch. The pressure used elsewhere is from '75 to 100 pounds per square inch, depending upon the pressure of the compressed air system in the factory in which the machine is being used, the large pressure reducing valve 2I5 being provided to ensure that the pressure in certain pipes doesnot rise above 100 pounds per square inch. The vertical pipe 22I, which leads from the large reducing valve 2I5, ends in a T 231. From the lefthand branch of this T a horizontal pipe 239 leads I ilng blasts of air upon the other Naumkeag tool and thereby open a valve to cause a Inasmuch as the two Naumkeag tools are similarly constructed and mounted, except that the tool I1 is mounted on the swinging bracket HI and consequently the rubber tubes 233, 24I are provided, only the construction and mounting of the Naumkeag tool I1 will be described in detail. Referring to Fig. 4, the tool I1 has the usual small tapered hollow stem, which fits in a tapered socket in the lower end of the bottom of the hollow vertical shaft I 69. Inasmuch as this shaft is mounted for vertical sliding movement so that, when the sole. of a shoe is pressed up against the tool the shaft will be pushedup blast of air to be directed upon the tool, it is desirable that the pulley which rotates this tool shaft should I the chamber 281.

through the handle and exert no sidewise pull upon the shaft. To this end a long bearing sleeve 241, which is clamped by a pinch screw 249 in a split lug on the bracket Ill, has a head at its upper end between which and a nut 25!, threaded on the sleeve 241, is clamped the inner ring 253 of a ball bearing, the outer ring being carried by a pulley 251. Thus the pulley rotates about the inner ring and exerts its sidewise thrust upon the stationary sleeve 241. The pulley is connected with the following manner. On the upper face of the pulley is a thin boss to which is fastened, by screws 26!, a driving member 259 (Fig. in the form of a disk grooves spaced apart 90. Into two of these grooves, which are in register, extend, respectively, two short arms 263, said arms projecting from opposite sides of a hub 265, which is fastened to the shaft I69. A cover 261 is also fastened to the grooved disk 259 and to the pulley 251 by the screws 26!. On the upper portion of the shaft I69 is fastened a collar 269 having a flat upper face, above which is by a bent lever 213 which is pivoted at 215 to the bracket I1! and the normal position of which may be regulated by means of a screw 211, which is threaded through the lever and abuts the bracket I1! so as to hold the roll 21! just out of contact with the top of the collar 269. When the shaft I69 is pushed up by the operator, as he holds the bottom of a shoe up against the Naumkeag tool I1, the bent lever 213 is rocked counterclockwise, and its upper end rocks clockwise a small lever 219 pivoted at 28!, whereupon the upper end of this small lever pushes to'the right a sliding pin 283 to open a spring pressed ball valve 285 in a fitting at the end of the tube 24!, and thereby admits compressed air into From this chamber a pipe 289 leads to a connector 29! (Fig. 6), in which is rotatably mounted one end of a generally horizontal fitting comprising a pipe 292 closed at its outer end and having leading therefrom two curved nozzles 293 which, when in operative position as shown in Fig. 4, direct two convergair upon the rear portion of the Naumkeag tool to clean the tool and to blow The closed pipe 292 is mounted in a bracket 295, being rotatably held in a socket in the bracket by an inclined plate 291, which is fastened to the bracket by a screw 299. The hub of a handle 39! is fastened to one end of the pipe 292 to provide means for turning the pipe to withdraw the nozzles from beneath the tool when it is desired to remove and replace the tool. A torsion spring 393, fast at one end to the bracket 295 and at the other end to the hub of the handle, tends at all times to swing the nozzles into the operative position shown in Fig. 4, a stop screw 395, threaded adapted to contact with the bracket, providing means for adjusting the operative positions of the nozzles. When it is desired to remove the Naumkeag tool, the nozzles may be swung down into the position shown in Fig. 6. A light spring 214 (Fig. 4), which rests the shaft I69 in i been completed, such dust as may cling to the a roll 21! carried shoe is removed by presenting the shoe to a large rotating brush 391 (Fig. 2) located in a dust hood 399; and while the shoe is being presented to the brush two blasts of air are directed upon the shoe, one from above and one from below, in directions which are respectively diagonally downwardly and diagonally upward. These two blasts are emitted from small perforations formed, respectively, in an upper horizontal pipe 8!! and in a lower horizontal pipe 3I3, both pipes having their right-hand ends closed by caps. Air is supplied to these perforated pipes from y. pipe 3!5 (see also Fig. 12) which leads from the T 19 down into a valve casing 3" containing a valve, not shown, which is normally held closed by a spring, not shown, and has a stem 3I9 which, when the valve is closed, projects considerably from the casing so that by pushing the stem of the valve to the left the valve may be opened. Leading from the bottom of the valve casing is a conduit consisting of various fittings, which terminates in an elbow 32!, from which leads the lower end of an upright pipe 323, said pipe being connected by Ts, and various fittings, to the open ends of the perforated blast pipes 3! I, 3I3.

The-dust hoods 25, 21 for the Naumkeag tools and the dust hood 399 for the cleaning brush are part of a common structure which is connected at its rear end (the right-hand end as viewed in Fig. l) to the blower system of the factory in which the machine is installed, so as to apply suction to the hoods. In order to apply all the force of the suction to the Naumkeag hoods when the Naumkeag tools are being used and to apply all of it to the cleaning brush when that brush is being used, separate conduits are provided which lead from the dust hoods of the Naumkeag tools and from the hood of the cleaning brush. These three conduits are shown in Fig. 11 near the rear of the machine where they are side by side, the outer conduits 325, 321 leading from the Naumkeag dust hoods and the middle conduit 329 leading from the dust hood of the cleaning brush. Three valves 33!, 333, 335, fast to a, common horizontal rotary shaft 331, are provided for closing the conduit 329 and simultaneously opening the conduits 325, 321 when the Naumkeag tools are being used, and for closing the conduits 325, 321 and opening the conduit 329 when the cleaning brush is being used. In order to rotate the shaft 331 90 back and forth, from the position shown in the figure, to a position in which the conduits leading from the Naumkeag dust hoods are closed, the shaft has fastened to it a crank arm 339, to which is pivoted one end of a two-part upon the cap 261 and at its upper and engages permit.

After the bufflng operations upon the shoe have link 34!,the parts of which are connected by a turnbuckle. One end of this link is pivoted at 343 to an arm 345, the hub of which is fast to a rock shaft 341. Also fastened to this rock shaft by a pinch screw 349 is the split hub of a second arm 35!, the outer end of which is pivoted at 353 to the upper end of a two-part treadle rod 355. The lower end of this treadle rod is pivoted at 351 to a treadle 359, said treadle being pivoted at 36! to the frame of the machine and being normally held up as far as a stop screw 363 will permit by a tension spring 365. In the positions of parts shown in Figs. 11 and 12, suction is being applied only to the conduits 325, 321 which lead from the Naumkeag dust hoods, and no blasts of air are being delivered from the perforated pipes 3! I, 3I3 (Fig. 2) into the hood of through 38!, this belt runs 1 chine which has been shown and described.

I claimed as new and desired to be secured Letters Patent of the United States is:

; tlOn ;a rotary abrading upon which said tool is mounted, a support in which said shaft is displaceable axially-when the the cleaning brush 301. When, however, the treadle 359 is depressed to rock the arms 3, 3H clockwise, suction will be applied only to the conduit 339, and at the same time the screw 3 will rotate a small bell crank lever 391, which is pivoted at 389, to cause the lower arm of this bell-crank lever to push to the left the stem 3l9 of the valve in the casing 3| 1 and thereby to open the valve so that blasts of air are delivered from the perforated pipes 3, 313 upon a shoe which is being presented to the cleaning brush 301.

The machine is driven (Fig. 1) from an electric motor 31l through a belt 313, which passes around a small pulley on the shaft of the motor and around a larger pulley 315 on a horizontal shaft 311, which is rotatably mounted in bearings in the frame of the machine. A larger pulley 319, mounted upon the same shaft 311, has passing around it a long narrow belt 38I from which, directly or indirectly, all the tools of the machine are rotated. This belt has two substantially vertical runs, one of which appears in Fig. 1, the directions of movement of the various runs of the belt being indicated in Figs. 1 and 3 by the arrows. Starting with the substantially vertical run directly behind the run which appears in Fig. l, the belt 38! leads up over a pulley 383 (Fig. 3), then forward around a pulley 385 (Fig. 4) which is rotatable about a vertical spindle carried by a small bracket 381, said bracket being fastened to the upright rod I13 about which the bracket 1| swings. The pulley-385 has two grooves, one to receive the belt 38l and the other to receive a short belt 389' which passes around the pulley 385 and around the pulley 251 so as to drive the Naumkeag tool l1. Returning to the main belt from the pulley 385 to the rear around a pulley 39l (Fig. 3), then forward around a pulley 393 (Fig. 1) which drives the Naumkeag tool l9, then to the rear over a pulley 395 on the countershaft and finally down and around the pulley 319. The cleaning brush 391 is driven by its short belt 391, which passes around a pulley 399 on the brush shaftand around a pulley 4M on the countershaft 35. In order to hasten the coming to rest of the moving parts after the power has been shut off from the motor, a brake shoe 403 (Fig. 1) may be applied to the under face of the pulley 319 by means of a treadle 495, which is pivoted at 401 to the frame ofthe machine and carries the braking shoe at its outer end.

Although the invention has been set forth as embodied in a particular machine, it should be understood that the invention is not limited in the scope of its application to the particular mais y Having described the invention, what 1. An abrading machine having in combinaan abrading tool, a support for said tool, said tool being constructed and arranged to be displaced relatively to said support by pressure ]'of the work, means for operating the tool, and 1 means responsive to displacement of the tool for directing upon the tool a blast of air when a work-piece is pressed against the tool.

2. An abrading machine having in combination tool of the disk type. a shaft tool is pressed against by the work, means for driving said shaft, and means responsive to axial the tool a blast-of air trolling the flow of positions, one

displacement of said shaft for directing upon pressed against the tool.

3. An abradlng machine having in combination, an abrading tool, a support for said tool, said tool being constructed and arranged to be displaced relatively to said support by pressure of the work, means for operating the tool, a nozzle for directing a blast of air upon the tool, a conduit through which air under pressure is suppliedto the nozzle, a valve in the conduit, and means responsive to displacement of the tool by pressure of a work-piece for opening the valve.

4. An abrading machine having in combination, a rotary abrading tool of the disk type, a support for said tool, said tool being constructed and arranged to be displaced relatively to said support by pressure of the work, a hood hood, and means responsive to displacement of the tool by the pressure of a work-piece for conair through the nozzles.

machine having in combina- 6. An abrading machine having in combination, a main tool, means for rotating said tool about a substantially vertical axis, an auxiliary tool, means for rotating said tool about a substantially horizontal axis, a suction hood for removing waste material generated by the operathe operation of the tools, said capable of being moved into and held in two of which is near to and the other of which is remote from the hood, the auxiliary main and auxiliary tools to cause the main tool to occupy its position near to the hood and to cause the auxiliary tool to occupy either its remote or its intermediate position as may be desired.

tion, a main tool, an auxiliary tool, a suction when a work-piece is at a higher pressure to the cylinder to cause movement of the tools.

9. An abrading machine having in combination, a main tool, an auxiliary tool, a suction hood for removing waste material generated by the operation of the tools, an arm by which the main tool is carried, said arm being pivoted for swinging movement about a substantially vertical axis to move the main tool into and out of operative position with respect to the hood, a second arm by which the auxiliary tool is carried, said arm being pivoted for swinging movement about a substantially horizontal axis to move the auxiliary tool into and out of operative position, and operator-controlled means including a connection between said tools for simultaneously swinging either tool into operative position and the other tool into inoperative position.

10. An abrading machine having in combina tion, a main tool, an auxiliary tool, a suction hood for removing waste material generated by the operation of the tools, carriers for the tools, operator-controlled means for moving the tool carriers to locate the main tool in front of the hood and to locate the auxiliary tool in an inoperative position remote from the hood, and means for varying the distance between the carriers in such manner that moving the main tool into position in front of the hood moves the auxiliary tool into a position intermediate between its position in front of the hood and its remote inoperative position.

11. An abrading machine having in combination, a suction hood, an inflatable tool movable into and out of operative relation to the hood, means including a cylinder and a piston in the cylinder for moving the tool, a nozzle for directing a blast of air upon the tool to clean it, a source of compressed air under pressure, and

means for conducting compressed air into the tool, into the nozzle and into the cylinder.

12. An abrading machine having in combination, a suction hood, an inflatable tool movable into and out of operative relation to the hood, means including a cylinder and a pistonin the cylinder for moving the tool, a nozzle for directing a blast of air upon the tool to clean it, a pipe adapted to direct a blast of air upon the shoe to clean it, a source of compressed air under pressure, and means for conducting compressed air into the tool, into the nozzle, into the cylinder and into the pipe.

13. An abrading machine having in combination, a suction hood, an inflatable tool movable into and out of operative relation to the hood by means including a cylinder and a piston in the cylinder, a nozzle for directing a blast of air upon the tool to clean it, a source of supply of compressed air under two pressures, means for conducting air at one pressure into the tool to inflate it, and means for conducting air at a greater pressure into the nozzle and into the cylinder.

14. An abrading machine having in combination, a tool for abrading the work, a brush for cleaning from the work the dust which clings to it, a suction hood for removing the dust cleaned from the work, a pipe arranged to direct upon the work while it is being presented to the brush a blast of air, means for applying suction to the hood, means for supplying compressed air to the pipe, and a common operating means for said suction applying means and said compressed air supplying means constructed and arranged to enable the operator to control the application of suction and the supply of compressed air simultaneously.

FLORENCE S. HADAWAY,

4 Ezecutria: of the Will of John B. Hadaway, De-

ceased. 

